JP2023161733A - Lamp for vehicle - Google Patents

Lamp for vehicle Download PDF

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Publication number
JP2023161733A
JP2023161733A JP2022072254A JP2022072254A JP2023161733A JP 2023161733 A JP2023161733 A JP 2023161733A JP 2022072254 A JP2022072254 A JP 2022072254A JP 2022072254 A JP2022072254 A JP 2022072254A JP 2023161733 A JP2023161733 A JP 2023161733A
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Japan
Prior art keywords
light
light guide
curved
protrusion
front side
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Japanese (ja)
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将平 福田
Shohei Fukuda
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Stanley Electric Co Ltd
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Stanley Electric Co Ltd
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Priority to JP2022072254A priority Critical patent/JP2023161733A/en
Priority to PCT/JP2023/014669 priority patent/WO2023210343A1/en
Publication of JP2023161733A publication Critical patent/JP2023161733A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/10—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source
    • F21S43/13—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source characterised by the type of light source
    • F21S43/14—Light emitting diodes [LED]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/235—Light guides
    • F21S43/236—Light guides characterised by the shape of the light guide
    • F21S43/237—Light guides characterised by the shape of the light guide rod-shaped
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/235—Light guides
    • F21S43/236—Light guides characterised by the shape of the light guide
    • F21S43/241—Light guides characterised by the shape of the light guide of complex shape
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/235—Light guides
    • F21S43/242—Light guides characterised by the emission area
    • F21S43/245—Light guides characterised by the emission area emitting light from one or more of its major surfaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2103/00—Exterior vehicle lighting devices for signalling purposes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2103/00—Exterior vehicle lighting devices for signalling purposes
    • F21W2103/10—Position lights
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2103/00—Exterior vehicle lighting devices for signalling purposes
    • F21W2103/20—Direction indicator lights
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2103/00—Exterior vehicle lighting devices for signalling purposes
    • F21W2103/20—Direction indicator lights
    • F21W2103/25—Direction indicator lights for rear-view mirrors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2103/00—Exterior vehicle lighting devices for signalling purposes
    • F21W2103/45—Reversing lights
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2103/00—Exterior vehicle lighting devices for signalling purposes
    • F21W2103/55—Daytime running lights [DRL]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2113/00—Combination of light sources
    • F21Y2113/10—Combination of light sources of different colours
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/30—Semiconductor lasers

Abstract

To provide a lamp for a vehicle in which a portion corresponding to a curved part of a light guide body can be visually recognized as a light emitting part.SOLUTION: In a lamp for a vehicle, light L emitted from a light source is made incident into a light guide body 3 from a light incident part which is provided at a base end side of the light guide body 3, the light L is guided toward a tip side of the light guide body 3, and a light emitting part provided at a front side of the light guide body 3 emits light by emitting the light L reflected by a plurality of reflection cuts 5a provided at a back face side of the light guide body 3 to the outside of the light guide body 3 from the front side of the light guide body 3. The light guide body 3 has: a curved part 7 in which a part of the light guide body 3 is curved between the light incident part and the light emitting part; a salient part 9 salient from a front side of the curved part 7 toward a side opposite to a side at which the light emitting part is located; and a light guide emitting part 10 located at a side opposing the salient part 9 of the curved part 7, and emitting a part L1 of the light L which is guided in the curved part 7 toward the salient part 9.SELECTED DRAWING: Figure 5

Description

本発明は、車両用灯具に関する。 The present invention relates to a vehicle lamp.

従来より、車両に搭載される車両用灯具として、発光ダイオード（ＬＥＤ）などの光源と、棒状の導光体（導光棒）とを組み合わせたものが知られている（例えば、下記特許文献１を参照。）。 Conventionally, as a vehicle lamp mounted on a vehicle, a combination of a light source such as a light emitting diode (LED) and a rod-shaped light guide (light guide rod) has been known (for example, the following Patent Document 1 ).

このような車両用灯具では、光源から出射された光を導光体の基端側に設けられた入射部から導光体の内部へと入射し、導光体の内部で反射を繰り返しながら、導光体の先端側に向けて光を導光させる。また、導光体の背面側に設けられた複数の反射カットで反射された光を導光体の正面側から導光体の外部へと出射する。これにより、導光体の正面側に設けられた発光部をライン状に発光させることが可能となっている。 In such a vehicle lamp, the light emitted from the light source enters the inside of the light guide from the entrance part provided on the base end side of the light guide, and is repeatedly reflected inside the light guide. Light is guided toward the tip of the light guide. Further, the light reflected by the plurality of reflection cuts provided on the back side of the light guide is emitted from the front side of the light guide to the outside of the light guide. This allows the light emitting section provided on the front side of the light guide to emit light in a line.

特許第６９５１３４２号公報Patent No. 6951342

ところで、上述した棒状の導光体では、例えば光源を配置する場所の制約などによって、入射部と発光部との間で導光体の一部が湾曲した湾曲部を設けることが行われている。 By the way, in the above-mentioned rod-shaped light guide, a curved part in which a part of the light guide is curved is provided between the incident part and the light emitting part due to, for example, restrictions on the location where the light source is placed. .

しかしながら、湾曲部は、入射部から入射した光を導光体の先端側に向けて導光させるための非発光部となっており、この湾曲部から導光体の正面側に向けて光を出射し、湾曲部を発光部として視認させることは困難であるため、導光体の長さに対して発光部の範囲を狭くするものとなる。 However, the curved part is a non-light-emitting part that guides the light incident from the incident part toward the tip of the light guide, and the curved part directs the light toward the front side of the light guide. Since it is difficult to emit light and visually recognize the curved portion as a light emitting portion, the range of the light emitting portion is narrowed relative to the length of the light guide.

本発明は、このような従来の事情に鑑みて提案されたものであり、導光体の湾曲部に対応した部分を発光部として視認させることを可能とした車両用灯具を提供することを目的とする。 The present invention has been proposed in view of the above-mentioned conventional circumstances, and an object of the present invention is to provide a vehicle lamp that allows a portion corresponding to a curved portion of a light guide to be visually recognized as a light emitting portion. shall be.

上記目的を達成するために、本発明は以下の手段を提供する。
〔１〕 光源と、棒状の導光体とを備え、前記光源から出射された光を前記導光体の基端側に設けられた入射部から前記導光体の内部へと入射し、前記導光体の先端側に向けて光を導光させると共に、前記導光体の背面側に設けられた複数の反射カットで反射された光を前記導光体の正面側から前記導光体の外部へと出射することによって、前記導光体の正面側に設けられた発光部を発光させる車両用灯具であって、
前記導光体は、
前記入射部と前記発光部との間で前記導光体の一部が湾曲した湾曲部と、
前記湾曲部の正面側から前記発光部が位置する側とは反対側に向かって突出された突出部と、
前記湾曲部の前記突出部と対向する側に位置して、前記湾曲部の内部で導光される光の一部を前記導光体から出射し前記突出部に向ける導光出射部とを有することを特徴とする車両用灯具。
〔２〕 前記導光出射部は、当該導光出射部から出射される光を前記突出部に向けて出射させる複数のレンズカットを含むことを特徴とする前記〔１〕に記載の車両用灯具。
〔３〕 前記突出部は、当該突出部の正面側から出射される光を拡散させる複数の第１の拡散カットを含むことを特徴とする前記〔１〕に記載の車両用灯具。
〔４〕 前記湾曲部の前記突出部と前記発光部との間に位置して、前記湾曲部の正面側から出射される光を拡散させる複数の第２の拡散カットを含むことを特徴とする前記〔１〕に記載の車両用灯具。
〔５〕 前記湾曲部の前記突出部を挟んで前記発光部が位置する側の径が前記突出部を挟んで前記発光部が位置する側とは反対側の径よりも大きいことを特徴とする前記〔１〕に記載の車両用灯具。
〔６〕 前記導光体の正面視において、前記突出部が前記湾曲部の最外周部よりも外側に突出して設けられていることを特徴とする前記〔１〕～〔５〕の何れか一項に記載の車両用灯具。
〔７〕 前記導光体の正面視において、前記入射部が前記湾曲部の最外周部よりも内側に位置することを特徴とする前記〔１〕～〔５〕の何れか一項に記載の車両用灯具。 In order to achieve the above object, the present invention provides the following means.
[1] A light source comprising a light source and a rod-shaped light guide, the light emitted from the light source being incident into the interior of the light guide from an entrance portion provided on the proximal end side of the light guide; The light is guided toward the tip side of the light guide, and the light reflected by a plurality of reflective cuts provided on the back side of the light guide is guided from the front side of the light guide. A vehicle lamp that causes a light emitting section provided on the front side of the light guide to emit light by emitting light to the outside,
The light guide is
a curved portion in which a portion of the light guide is curved between the incident portion and the light emitting portion;
a protruding portion protruding from the front side of the curved portion toward a side opposite to the side where the light emitting portion is located;
a light guiding/emitting part located on a side of the curved part facing the protruding part and directing a part of the light guided inside the curved part from the light guide toward the protruding part; A vehicle lamp characterized by:
[2] The vehicular lamp according to [1], wherein the light guide/output section includes a plurality of lens cuts that direct the light emitted from the light guide/output section toward the protrusion. .
[3] The vehicle lamp according to [1], wherein the protrusion includes a plurality of first diffusion cuts that diffuse light emitted from the front side of the protrusion.
[4] A plurality of second diffusion cuts are located between the protruding part of the curved part and the light emitting part and diffuse the light emitted from the front side of the curved part. The vehicle lamp according to [1] above.
[5] A diameter of the curved portion on the side where the light emitting part is located across the protrusion is larger than a diameter on the opposite side of the protrusion from the side where the light emitting part is located. The vehicle lamp according to [1] above.
[6] Any one of [1] to [5] above, wherein the protruding portion is provided to protrude outward from the outermost peripheral portion of the curved portion when viewed from the front of the light guide. Vehicle lighting equipment described in section.
[7] The device according to any one of [1] to [5] above, wherein the incident portion is located inside the outermost peripheral portion of the curved portion when viewed from the front of the light guide. Vehicle lighting.

以上のように、本発明によれば、導光体の湾曲部に対応した部分を発光部として視認させることを可能とした車両用灯具を提供することが可能である。 As described above, according to the present invention, it is possible to provide a vehicle lamp that allows the portion corresponding to the curved portion of the light guide to be visually recognized as a light emitting portion.

本発明の実施形態に係る車両用灯具の構成を示す正面図である。1 is a front view showing the configuration of a vehicle lamp according to an embodiment of the present invention. 図１に示す車両用灯具の構成を示す上面図である。2 is a top view showing the configuration of the vehicle lamp shown in FIG. 1. FIG. 図１に示す車両用灯具が備える導光体の湾曲部を正面側から見た斜視図である。FIG. 2 is a perspective view of a curved portion of a light guide included in the vehicle lamp shown in FIG. 1, viewed from the front side. 図１に示す車両用灯具が備える導光体の湾曲部を背面側から見た斜視図である。FIG. 2 is a perspective view of the curved portion of the light guide included in the vehicle lamp shown in FIG. 1, viewed from the back side. 図１に示す車両用灯具が備える導光体の湾曲部における光の光路を示す上面図である。2 is a top view showing an optical path of light in a curved portion of a light guide provided in the vehicle lamp shown in FIG. 1. FIG. 図５に示す車両用灯具が備える導光体の湾曲部の拡大断面図である。6 is an enlarged sectional view of a curved portion of a light guide provided in the vehicle lamp shown in FIG. 5. FIG. 図１に示す車両用灯具の光源を点灯させた際の導光体の発光状態を示す写真である。2 is a photograph showing a light emitting state of a light guide when the light source of the vehicle lamp shown in FIG. 1 is turned on.

以下、本発明の実施形態について、図面を参照して詳細に説明する。
なお、以下の説明で用いる図面においては、各構成要素を見やすくするため、構成要素によって寸法の縮尺を異ならせて示すことがあり、各構成要素の寸法比率などが実際と同じであるとは限らない。 Embodiments of the present invention will be described in detail below with reference to the drawings.
In addition, in the drawings used in the following explanation, dimensions may be shown at different scales depending on the component in order to make each component easier to see, and the dimensional ratio of each component may not be the same as in reality. do not have.

本発明の一実施形態として、例えば図１～図７に示すポジションランプに適用した車両用灯具１について説明する。
なお、図１は、車両用灯具１の構成を示す正面図である。図２は、車両用灯具１の構成を示す上面図である。図３は、車両用灯具１が備える導光体３の湾曲部７を正面側から見た斜視図である。図４は、車両用灯具１が備える導光体３の湾曲部７を背面側から見た斜視図である。図５は、車両用灯具１が備える導光体３の湾曲部７における光Ｌの光路を示す上面図である。図６は、車両用灯具１が備える導光体３の湾曲部７の拡大断面図である。図７は、車両用灯具１の光源２を点灯させた際の導光体３の発光状態を示す写真である。 As one embodiment of the present invention, a vehicle lamp 1 applied to a position lamp shown in FIGS. 1 to 7, for example, will be described.
Note that FIG. 1 is a front view showing the configuration of the vehicle lamp 1. As shown in FIG. FIG. 2 is a top view showing the configuration of the vehicle lamp 1. As shown in FIG. FIG. 3 is a perspective view of the curved portion 7 of the light guide 3 included in the vehicle lamp 1, viewed from the front side. FIG. 4 is a perspective view of the curved portion 7 of the light guide 3 included in the vehicle lamp 1, viewed from the back side. FIG. 5 is a top view showing the optical path of the light L in the curved portion 7 of the light guide 3 included in the vehicle lamp 1. FIG. 6 is an enlarged sectional view of the curved portion 7 of the light guide 3 included in the vehicle lamp 1. FIG. 7 is a photograph showing the light emitting state of the light guide 3 when the light source 2 of the vehicle lamp 1 is turned on.

また、以下に示す図面では、ＸＹＺ直交座標系を設定し、Ｘ軸方向を車両用灯具１の前後方向（長さ方向）、Ｙ軸方向を車両用灯具１の左右方向（幅方向）、Ｚ軸方向を車両用灯具１の上下方向（高さ方向）として、それぞれ示すものとする。 In addition, in the drawings shown below, an XYZ orthogonal coordinate system is set, with the The axial direction is shown as the vertical direction (height direction) of the vehicle lamp 1, respectively.

本実施形態の車両用灯具１は、図１及び図２に示すように、光源２と、棒状の導光体３とを備え、光源２から出射された光Ｌを導光体３の基端側に設けられた入射部４から導光体３の内部へと入射し、導光体３の先端側に向けて光Ｌを導光させると共に、導光体３の背面側に設けられた複数の反射カット５ａで反射された光Ｌを導光体３の正面側に設けられた発光部６から出射する。 As shown in FIGS. 1 and 2, the vehicle lamp 1 of this embodiment includes a light source 2 and a rod-shaped light guide 3, and directs the light L emitted from the light source 2 to the base end of the light guide 3. The light L enters the inside of the light guide 3 from the entrance part 4 provided on the side, and guides the light L toward the tip side of the light guide 3. The light L reflected by the reflection cut 5a is emitted from the light emitting section 6 provided on the front side of the light guide 3.

光源２は、例えばＬＥＤからなり、このＬＥＤを駆動する駆動回路が設けられた回路基板（図示せず。）の面上に実装されて、導光体３の基端側に向けて光Ｌを放射状に出射する。 The light source 2 is made of an LED, for example, and is mounted on the surface of a circuit board (not shown) provided with a drive circuit for driving the LED, and emits light L toward the base end of the light guide 3. Emits radiation radially.

導光体３は、例えばポリカーボネイトやアクリル等の透明樹脂やガラスなどの光透過性部材からなる。導光体３は、車幅方向に延在し、且つ、車両の前端又は後端側のコーナー部に付与されるスラント形状に合わせて、車幅方向の内側よりも外側が後退する方向に向かって湾曲又は傾斜した長尺形状を有している。 The light guide 3 is made of a transparent resin such as polycarbonate or acrylic, or a light-transmitting member such as glass. The light guide 3 extends in the vehicle width direction, and is oriented in a direction in which the outside in the vehicle width direction recedes more than the inside in accordance with the slant shape provided at the front or rear corner of the vehicle. It has a curved or inclined elongated shape.

入射部４は、導光体３の基端側に位置して、光源２と対向する平坦（平面）な入射面４ａを有している。入射部４は、この入射面４ａから光源２から出射された光Ｌを導光体３の内部へと入射する。これにより、入射面４ａから入射した光Ｌは、導光体３の内部で反射を繰り返しながら、導光体３の先端側に向けて導光されることになる。 The entrance part 4 is located on the base end side of the light guide 3 and has a flat (plane) entrance surface 4a facing the light source 2. The entrance section 4 allows the light L emitted from the light source 2 to enter the inside of the light guide 3 through the entrance surface 4a. Thereby, the light L entering from the entrance surface 4a is guided toward the tip side of the light guide 3 while being repeatedly reflected inside the light guide 3.

なお、入射部４については、上述した平坦（平面）な入射面４ａを有する構成に限らず、光源２から放射状に出射された光Ｌを平行化又は集光しながら、導光体３の内部へと入射するレンズ形状を有する構成であってもよい。 Note that the entrance part 4 is not limited to the above-mentioned configuration having the flat (plane) entrance surface 4a, and while collimating or condensing the light L emitted radially from the light source 2, the inside of the light guide 3 It may also be configured to have a lens shape that allows the light to enter.

複数の反射カット５ａは、導光体３の背面側に入射した光Ｌを導光体３の正面側から外部へと出射（透過）する角度で反射させるものであればよく、その形状や大きさ、数等について、特に限定されるものではない。 The plurality of reflection cuts 5a may be any one that reflects the light L incident on the back side of the light guide 3 at an angle at which it is emitted (transmitted) from the front side of the light guide 3 to the outside, and the shape and size of the plurality of reflection cuts 5a may vary. There are no particular limitations on the size, number, etc.

本実施形態では、反射カット５ａとして、例えば、導光体３の背面側の中央部を導光体３の軸線方向とは直交する鉛直方向（本実施形態では上下方向）に切り欠く断面略三角形状の溝部が導光体３の軸線方向（本実施形態では左右方向）に並ぶことによって構成されている。なお、反射カット５ａは、導光体３の背面側に、発光部６の軸線方向の長さ範囲に対応して設けられている。 In the present embodiment, the reflective cut 5a is, for example, a substantially triangular cross section cut out in the center of the back side of the light guide 3 in a vertical direction (vertical direction in this embodiment) perpendicular to the axial direction of the light guide 3. The shaped grooves are arranged in the axial direction of the light guide 3 (in the present embodiment, in the left-right direction). Note that the reflective cut 5a is provided on the back side of the light guide 3 so as to correspond to the length range of the light emitting section 6 in the axial direction.

また、複数の反射カット５ａは、導光体３の軸線方向において、後述する発光部６をより均一に発光させるため、導光体３の基端側から先端側に向かって、この反射カット５ａを形成する溝部の隣り合う間隔が漸次狭くなっていてもよく、若しくは、この反射カット５ａを形成する溝部の深さが漸次深くなっていてもよい。 In addition, in order to cause the light emitting section 6 (described later) to emit light more uniformly in the axial direction of the light guide 3, the plurality of reflective cuts 5a are arranged from the base end side to the distal end side of the light guide body 3. The interval between adjacent grooves forming the reflection cut 5a may be gradually narrowed, or the depth of the groove forming the reflective cut 5a may be gradually deepened.

また、導光体３の背面側の複数の反射カット５ａを挟んだ両側には、導光体３の内部で導光される光Ｌを反射する一対の反射面５ｂが設けられている。一対の反射面５ｂは、導光体３の鉛直断面において、円弧状に湾曲した凹状の曲面により構成されている。 Furthermore, a pair of reflective surfaces 5b that reflect the light L guided inside the light guide 3 are provided on both sides of the light guide 3 across the plurality of reflective cuts 5a on the back side. The pair of reflective surfaces 5b are constituted by concave curved surfaces curved in an arc shape in the vertical cross section of the light guide 3.

発光部６は、導光体３の正面側に位置して、導光体３の軸線方向に連続した出射面６ａを有している。出射面６ａは、導光体３の鉛直断面において、円弧状に湾曲した凸状の曲面により構成されている。発光部６では、この出射面６ａから光Ｌを外部へと出射することにより発光する。 The light emitting section 6 is located on the front side of the light guide 3 and has an emission surface 6a that is continuous in the axial direction of the light guide 3. The output surface 6a is configured of a convex curved surface curved in an arc shape in the vertical cross section of the light guide 3. The light emitting section 6 emits light by emitting the light L to the outside from the emission surface 6a.

なお、出射面６ａには、この出射面６ａから外部に向けて出射される光Ｌを拡散させるための複数の拡散カット（図示せず。）が設けられた構成であってもよい。拡散カットとしては、例えば、フルートカットや魚眼カットと呼ばれるレンズカットや、ローレット加工やシボ加工等を施すことによって形成された凹凸構造などを挙げることができる。また、この拡散カットの形状等を調整することによって、出射面６ａから出射される光Ｌの拡散度合いを制御することが可能である。また、出射面６ａの正面側に別の拡散レンズを配置した構成としてもよい。 Note that the output surface 6a may be provided with a plurality of diffusion cuts (not shown) for diffusing the light L emitted from the output surface 6a toward the outside. Examples of the diffusion cut include a lens cut called a flute cut or a fisheye cut, and a concavo-convex structure formed by knurling, graining, or the like. Further, by adjusting the shape of this diffusion cut, etc., it is possible to control the degree of diffusion of the light L emitted from the output surface 6a. Alternatively, another diffusion lens may be arranged on the front side of the output surface 6a.

導光体３は、入射部４と発光部６との間で一部が湾曲した湾曲部７と、複数の反射カット５ａ、一対の反射面５ｂ及び発光部６が設けられた延長部８とを有している。すなわち、この導光体３は、光源２と対向する位置から、前方に向かって延長され、湾曲部７により湾曲した後、延長部８が車両の幅方向に延長された長尺形状を有している。 The light guide 3 includes a curved portion 7 that is partially curved between the incident portion 4 and the light emitting portion 6, and an extension portion 8 provided with a plurality of reflective cuts 5a, a pair of reflective surfaces 5b, and the light emitting portion 6. have. That is, the light guide 3 has an elongated shape that extends forward from a position facing the light source 2, is bent by the bending part 7, and then the extension part 8 is extended in the width direction of the vehicle. ing.

特に、本実施形態の導光体３では、その正面視において、入射部４が湾曲部７の最外周部よりも内側に位置するように、湾曲部７が平面視でＳ字状に湾曲した形状となっている。車両用灯具１の部品レイアウトに応じて、光源２と基板の向きを変更することが可能なので、これにより、湾曲部７の形状はＳ字状でなくでもよく、入射部４から入射した光Ｌを延長部８に導光させる屈曲形状があれば問題ない。 In particular, in the light guide 3 of this embodiment, the curved part 7 is curved in an S-shape in a plan view so that the entrance part 4 is located inside the outermost peripheral part of the curved part 7 in a front view. It has a shape. Since the orientation of the light source 2 and the board can be changed according to the component layout of the vehicle lamp 1, the shape of the curved part 7 does not need to be S-shaped, and the light L incident from the incident part 4 can be changed. There is no problem as long as there is a bent shape that guides the light to the extension part 8.

ところで、本実施形態の車両用灯具１は、図３～図６に示すように、湾曲部７の正面側から発光部６が位置する側とは反対側に向かって突出された突出部９と、湾曲部７の突出部９と対向する側に位置する導光出射部１０とを有している。 By the way, as shown in FIGS. 3 to 6, the vehicle lamp 1 of the present embodiment has a protruding portion 9 that protrudes from the front side of the curved portion 7 toward the side opposite to the side where the light emitting portion 6 is located. , and a light guiding/emitting part 10 located on the side opposite to the protruding part 9 of the curved part 7.

突出部９は、導光体３の正面視において、湾曲部７の最外周部よりも外側に突出して設けられている。すなわち、この突出部９は、導光体３の正面視において、湾曲部７の視認しづらい非発光部となる部分の正面側を覆い、且つ、発光部６と連続した発光部を形成するように、湾曲部７の正面側から発光部６が位置する側とは反対側に向かって板状に突出して設けられている。 The protruding portion 9 is provided so as to protrude outward from the outermost peripheral portion of the curved portion 7 when the light guide 3 is viewed from the front. That is, when the light guide 3 is viewed from the front, the protruding portion 9 covers the front side of the non-light emitting portion of the curved portion 7 that is difficult to see, and forms a light emitting portion that is continuous with the light emitting portion 6. It is provided so as to protrude in a plate shape from the front side of the curved part 7 toward the side opposite to the side where the light emitting part 6 is located.

また、製造方法上の関係で、突出部９は、湾曲部７の接線に対して直交する方向に湾曲部７と接続されているが、湾曲部７への突出部９の接続部は必ずしもこのような構成でなくてもよい。 Further, due to the manufacturing method, the protruding part 9 is connected to the curved part 7 in a direction perpendicular to the tangent of the curved part 7, but the connection part of the protruding part 9 to the curved part 7 is not necessarily connected in this way. It is not necessary to have such a configuration.

さらに、導光体３は、湾曲部７の突出部９を挟んで発光部６が位置する側の径Ｒ１が突出部９を挟んで発光部６が位置する側とは反対側の径Ｒ２よりも大きくなっている。これにより、湾曲部７の内部で導光される光Ｌを突出部９に入射させることなく、延長部８側へと導光させることが可能となっている。 Furthermore, the light guide 3 has a diameter R1 on the side where the light emitting part 6 is located across the protrusion 9 of the curved part 7, and a diameter R2 on the opposite side to the side where the light emitting part 6 is located across the protrusion 9. is also getting bigger. Thereby, the light L guided inside the curved portion 7 can be guided toward the extension portion 8 without being incident on the protruding portion 9 .

なお、図６には、突出部９を挟んで発光部６が位置する側とは反対側の径Ｒ２をＲ１と同じ径Ｒ１’とした場合の仮想線を図示している。この場合、湾曲部７の内部で導光される一部の光Ｌ’が突出部９に入射してしまい、意図しない方向に出射し点光りとなる可能性がある。 Note that FIG. 6 shows a virtual line in the case where the diameter R2 on the opposite side of the protrusion 9 from the side where the light emitting part 6 is located is set to the same diameter R1' as R1. In this case, a part of the light L' guided inside the curved portion 7 may enter the protruding portion 9 and be emitted in an unintended direction, resulting in a point of light.

導光出射部１０は、湾曲部７の内部で導光される光Ｌのうち一部の光Ｌ１を突出部９に向けて出射する部分である。 The light guiding/emitting part 10 is a part that emits part of the light L1 of the light L guided inside the curved part 7 toward the protruding part 9 .

また、例えば、導光出射部１０の出射面６ａと同じ側の面には、複数のレンズカット１１が設けられている。これによって、導光出射部１０にあたる光Ｌのうち出射する光線の成分が増える。また、レンズカット１１の制御により、光Ｌ１を突出部９に向かうように出射させることができる。 Further, for example, a plurality of lens cuts 11 are provided on the surface of the light guide and output section 10 on the same side as the output surface 6a. As a result, the component of the emitted light beam out of the light L that hits the light guiding/emitting section 10 increases. Further, by controlling the lens cut 11, the light L1 can be emitted toward the protrusion 9.

本実施形態では、レンズカット１１として、湾曲部７の軸線方向（本実施形態では左右方向）とは直交する方向（本実施形態では上下方向）に延在する凸状又は凹状のローレットが湾曲部７の軸線方向に並ぶことによって構成されている。これにより、レンズカット１１により光Ｌ１を出射させることができ、導光出射部１０では、これら複数のレンズカット１１により光Ｌ１を突出部９に向けて出射する。 In this embodiment, as the lens cut 11, a convex or concave knurling extending in a direction (vertical direction in this embodiment) perpendicular to the axial direction (in this embodiment, horizontal direction) of the curved part 7 is used as the lens cut 11 in the curved part 7. 7 are arranged in the axial direction. Thereby, the light L1 can be emitted by the lens cut 11, and in the light guide/emission section 10, the light L1 is emitted toward the protrusion 9 by the plurality of lens cuts 11.

なお、レンズカット１１については、上述したローレットにより構成にされたものに限らず、突出部９に向けて光Ｌ１を出射するものであればよく、例えばプリズムカットや魚眼カットなど、その形状や大きさ、数等について適宜変更を加えることが可能である。 Note that the lens cut 11 is not limited to the above-mentioned knurling structure, but may be any one that emits the light L1 toward the protrusion 9. For example, the lens cut 11 may have a shape such as a prism cut or a fisheye cut. It is possible to make appropriate changes in size, number, etc.

導光体３では、上述した導光出射部１０から出射された光Ｌ１を突出部９の背面側から入射した後、突出部９の正面側から出射する。これにより、突出部９の正面側を発光部として発光させることが可能である。 In the light guide 3, the light L1 emitted from the light guide/output section 10 described above enters from the back side of the protrusion 9 and then is emitted from the front side of the protrusion 9. Thereby, it is possible to cause the front side of the protruding portion 9 to emit light as a light emitting portion.

また、突出部９には、当該突出部９の正面側から出射される光Ｌ１を拡散させるための複数の第１の拡散カット１２が設けられている。第１の拡散カット１２としては、例えば、フルートカットや魚眼カットと呼ばれるレンズカットや、ローレット加工やシボ加工等を施すことによって形成された凹凸構造などを挙げることができる。また、第１の拡散カット１２の形状等を調整することによって、突出部９の正面側から出射される光Ｌ１の拡散度合いを制御することが可能である。 Further, the protrusion 9 is provided with a plurality of first diffusion cuts 12 for diffusing the light L1 emitted from the front side of the protrusion 9. Examples of the first diffusion cut 12 include a lens cut called a flute cut or a fisheye cut, and an uneven structure formed by knurling, graining, or the like. Further, by adjusting the shape of the first diffusion cut 12, etc., it is possible to control the degree of diffusion of the light L1 emitted from the front side of the protrusion 9.

本実施形態では、突出部９の正面側から出射される光Ｌ１を突出部９の軸線方向（本実施形態では左右方向）及びそれとは直交する方向（本実施形態では上下方向）に拡散させるため、突出部９の背面側に複数の第１の拡散カット１２ａと、突出部９の正面側に複数の第１の拡散カット１２ｂとが設けられている。 In the present embodiment, in order to diffuse the light L1 emitted from the front side of the protrusion 9 in the axial direction of the protrusion 9 (in the present embodiment, the left-right direction) and in a direction perpendicular thereto (in the present embodiment, the vertical direction). , a plurality of first diffusion cuts 12a are provided on the back side of the protrusion 9, and a plurality of first diffusion cuts 12b are provided on the front side of the protrusion 9.

第１の拡散カット１２ａは、突出部９の上下方向に延在する凸状又は凹状のローレットが突出部９の左右方向に並ぶことによって構成されている。一方、第１の拡散カット１２ｂは、突出部９の左右方向に延在する凸状又は凹状のローレットが突出部９の上下方向に並ぶことによって構成されている。 The first diffusion cut 12 a is formed by convex or concave knurling extending in the vertical direction of the protrusion 9 and arranged in the left-right direction of the protrusion 9 . On the other hand, the first diffusion cut 12b is formed by convex or concave knurling extending in the left-right direction of the protrusion 9 and arranged in the vertical direction of the protrusion 9.

これにより、導光出射部１０から出射された光Ｌ１は、突出部９の背面側から突出部９の左右方向に拡散しながら入射した後、突出部９の正面側から突出部９の上下方向に拡散しながら出射される。 Thereby, the light L1 emitted from the light guiding/emitting part 10 enters the protruding part 9 from the back side of the protruding part 9 while being diffused in the left-right direction of the protruding part 9, and then from the front side of the protruding part 9 in the vertical direction of the protruding part 9. It is emitted while being diffused.

また、湾曲部７の突出部９と発光部６との間には、湾曲部７の正面側から出射される光Ｌ２を拡散させるための複数の第２の拡散カット１３が設けられている。 Further, a plurality of second diffusion cuts 13 are provided between the protruding portion 9 of the curved portion 7 and the light emitting portion 6 for diffusing the light L2 emitted from the front side of the curved portion 7.

本実施形態では、第２の拡散カット１３として、湾曲部７の軸線方向（左右方向）に延在する凸状又は凹状のローレットが湾曲部７の軸線方向とは直交する方向（上下方向）に並ぶことによって構成されている。 In this embodiment, as the second diffusion cut 13, a convex or concave knurling extending in the axial direction (horizontal direction) of the curved portion 7 is formed in a direction (vertical direction) orthogonal to the axial direction of the curved portion 7. It is constructed by lining up.

導光体３では、湾曲部７の突出部９と発光部６との間において、複数の第２の拡散カット１３により導光体３の左右方向に拡散された光Ｌ１を導光体３の正面側から出射する。これにより、光Ｌが導光体３の背面に設けられる複数の反射カット５にあたって、導光体３の前面を透過し出射する際に、第２の拡散カット１３にて屈折し導光体３の正面や側面に向けて制御されて出射する。 In the light guide 3, between the protruding part 9 of the curved part 7 and the light emitting part 6, the light L1 diffused in the left and right direction of the light guide 3 by the plurality of second diffusion cuts 13 is transmitted to the light guide 3. Emit from the front side. As a result, when the light L hits the plurality of reflective cuts 5 provided on the back surface of the light guide 3, transmits through the front surface of the light guide 3, and exits, it is refracted by the second diffusion cut 13 and is reflected in the light guide 3. The beam is emitted in a controlled manner towards the front or side of the object.

以上のように、本実施形態の車両用灯具１では、上述した湾曲部７の正面側から発光部６が位置する側とは反対側に向かって突出された突出部９を設け、湾曲部７の内部で導光される光Ｌのうち一部の光Ｌ１を導光出射部１０から空気層を経由して突出部９に向けて出射する。 As described above, in the vehicle lamp 1 of the present embodiment, the protruding part 9 is provided which protrudes from the front side of the above-mentioned curved part 7 toward the side opposite to the side where the light emitting part 6 is located. A part of the light L1 out of the light L guided inside is emitted from the light guiding/emitting part 10 toward the protruding part 9 via the air layer.

このように、導光体３の湾曲部７の延長する方向と略直交する方向に突出部９を設けると共に、湾曲部７に導光出射部１０を設けることで、導光体３の内部を導光する光Ｌの光路外に位置していても、突出部９を発光させることが可能となる。なお、導光出射部１０から空気層を挟んで突出部９にＬ１を出射させるため、導光体３の延長部８に導光していく光Ｌを必要以上に使うことがなく、湾曲部７の前面に発光部を作成することができる。 In this way, by providing the protruding part 9 in a direction substantially perpendicular to the direction in which the curved part 7 of the light guide 3 extends, and by providing the light guide and output part 10 in the curved part 7, the inside of the light guide 3 can be viewed. Even if the protrusion 9 is located outside the optical path of the light L to be guided, it is possible to cause the protrusion 9 to emit light. In addition, since the light L1 is emitted from the light guide/output part 10 to the protruding part 9 with an air layer in between, the light L guided to the extension part 8 of the light guide 3 is not used more than necessary, and the curved part A light emitting part can be created on the front surface of 7.

また、導光体３では、導光出射部１０から出射された光Ｌ１を突出部９の背面側から入射した後、突出部９の正面側から出射する。これにより、導光体３の湾曲部７に対応した部分に設けられた突出部９を延長部８の発光部６と連続した発光部として視認させることが可能である。 Further, in the light guide 3, the light L1 emitted from the light guide/output section 10 enters from the back side of the protrusion 9 and then is emitted from the front side of the protrusion 9. Thereby, it is possible to visually recognize the protruding portion 9 provided in the portion corresponding to the curved portion 7 of the light guide 3 as a light emitting portion continuous with the light emitting portion 6 of the extension portion 8.

ここで、実際に光源２を点灯させた際の上記導光体３の発光状態を図７に示す。なお、図７は、上記導光体３を正面側から見た発光状態である。 Here, FIG. 7 shows the light emitting state of the light guide 3 when the light source 2 is actually turned on. Note that FIG. 7 shows the light emitting state when the light guide 3 is viewed from the front side.

図７に示すように、導光体３の湾曲部７に対応した部分（図７中の囲み部分）に設けられた突出部９を延長部８の発光部６と連続した発光部として視認させることが可能である。 As shown in FIG. 7, the protruding portion 9 provided in the portion corresponding to the curved portion 7 of the light guide 3 (enclosed portion in FIG. 7) is visually recognized as a light emitting portion continuous with the light emitting portion 6 of the extension portion 8. Is possible.

なお、本発明は、上記実施形態のものに必ずしも限定されるものではなく、本発明の趣旨を逸脱しない範囲において種々の変更を加えることが可能である。
例えば、上記車両用灯具１では、実際の車両のデザイン等に合わせて、上記導光体３の形状などを適宜変更することが可能である。 Note that the present invention is not necessarily limited to the embodiments described above, and various changes can be made without departing from the spirit of the present invention.
For example, in the vehicle lamp 1, the shape of the light guide 3 can be changed as appropriate to match the design of the actual vehicle.

また、上記車両用灯具１では、上述した光源２やインナーレンズとなる導光体３の他にも、例えば、別のインナーレンズやリフレクタ、エクステンションなどの他の部材と組み合わせることが可能である。 Further, in addition to the above-described light source 2 and light guide body 3 serving as an inner lens, the vehicle lamp 1 can be combined with other members such as another inner lens, a reflector, and an extension.

なお、以上は車幅灯（ポジションランプ）に用いる光学系を具体例として本発明の内容を説明していたが、本発明が適用される車両用灯具については、特に限定されるものではなく、例えば、尾灯（テールランプ）や昼間点灯用ランプ（ＤＲＬ）、バックランプ、方向指示器（ウィンカーランプ）、サイドマーカーランプなど、本発明を幅広く適用することが可能である。 Although the content of the present invention has been explained above using an optical system used for a side lamp (position lamp) as a specific example, the vehicle lamp to which the present invention is applied is not particularly limited. For example, the present invention can be widely applied to tail lamps, daytime running lamps (DRLs), back lamps, direction indicators (winker lamps), side marker lamps, and the like.

また、上記光源２については、光Ｌを放射状に出射するものであればよく、上述したＬＥＤ以外にも、例えばレーザーダイオード（ＬＤ）などの発光素子を用いることができる。また、光源２が発する光の色については、赤色光や白色光、橙色光など、その車両用灯具の用途に応じて適宜変更することが可能である。 Further, the light source 2 may be any light source that emits the light L radially, and in addition to the above-mentioned LED, a light emitting element such as a laser diode (LD) may be used. Further, the color of the light emitted by the light source 2 can be changed as appropriate, such as red light, white light, or orange light, depending on the use of the vehicle lamp.

１…車両用灯具 ２…光源 ３…導光体 ４…入射部 ５ａ…反射カット ６…発光部 ７…湾曲部 ８…延長部 ９…突出部 １０…導光出射部 １１…レンズカット １２…第１の拡散カット １３…第２の拡散カット Ｌ…光 DESCRIPTION OF SYMBOLS 1... Vehicle lamp 2... Light source 3... Light guide 4... Incident part 5a... Reflection cut 6... Light emitting part 7... Curved part 8... Extension part 9... Projection part 10... Light guide output part 11... Lens cut 12... Section 1 diffusion cut 13...2nd diffusion cut L...light

Claims (7)

光源と、棒状の導光体とを備え、前記光源から出射された光を前記導光体の基端側に設けられた入射部から前記導光体の内部へと入射し、前記導光体の先端側に向けて光を導光させると共に、前記導光体の背面側に設けられた複数の反射カットで反射された光を前記導光体の正面側から前記導光体の外部へと出射することによって、前記導光体の正面側に設けられた発光部を発光させる車両用灯具であって、
前記導光体は、
前記入射部と前記発光部との間で前記導光体の一部が湾曲した湾曲部と、
前記湾曲部の正面側から前記発光部が位置する側とは反対側に向かって突出された突出部と、
前記湾曲部の前記突出部と対向する側に位置して、前記湾曲部の内部で導光される光の一部を前記導光体から出射し前記突出部に向ける導光出射部とを有することを特徴とする車両用灯具。 The light guide includes a light source and a rod-shaped light guide, and the light emitted from the light source enters the inside of the light guide from an entrance portion provided on the proximal end side of the light guide. The light is guided toward the tip side of the light guide, and the light reflected by a plurality of reflective cuts provided on the back side of the light guide is guided from the front side of the light guide to the outside of the light guide. A vehicle lamp that causes a light emitting part provided on the front side of the light guide to emit light by emitting light,
The light guide is
a curved portion in which a portion of the light guide is curved between the incident portion and the light emitting portion;
a protruding portion protruding from the front side of the curved portion toward a side opposite to the side where the light emitting portion is located;
a light guiding/emitting part located on a side of the curved part facing the protruding part and directing a part of the light guided inside the curved part from the light guide toward the protruding part; A vehicle lamp characterized by: 前記導光出射部は、当該導光出射部から出射される光を前記突出部に向けて出射させる複数のレンズカットを含むことを特徴とする請求項１に記載の車両用灯具。 2. The vehicular lamp according to claim 1, wherein the light guide/output section includes a plurality of lens cuts that direct the light emitted from the light guide/output section toward the protrusion. 前記突出部は、当該突出部の正面側から出射される光を拡散させる複数の第１の拡散カットを含むことを特徴とする請求項１に記載の車両用灯具。 The vehicular lamp according to claim 1, wherein the protrusion includes a plurality of first diffusion cuts that diffuse light emitted from the front side of the protrusion. 前記湾曲部の前記突出部と前記発光部との間に位置して、前記湾曲部の正面側から出射される光を拡散させる複数の第２の拡散カットを含むことを特徴とする請求項１に記載の車両用灯具。 Claim 1, further comprising a plurality of second diffusion cuts located between the protruding part of the curved part and the light emitting part to diffuse light emitted from the front side of the curved part. Vehicle lighting equipment described in . 前記湾曲部の前記突出部を挟んで前記発光部が位置する側の径が前記突出部を挟んで前記発光部が位置する側とは反対側の径よりも大きいことを特徴とする請求項１に記載の車両用灯具。 1 . The diameter of the curved portion on the side on which the light emitting portion is located across the protrusion is larger than the diameter on the side opposite to the side on which the light emitting portion is located across the protrusion. Vehicle lighting equipment described in . 前記導光体の正面視において、前記突出部が前記湾曲部の最外周部よりも外側に突出して設けられていることを特徴とする請求項１～５の何れか一項に記載の車両用灯具。 6. The vehicle according to claim 1, wherein the protruding portion is provided to protrude outward from the outermost peripheral portion of the curved portion when viewed from the front of the light guide. Light equipment. 前記導光体の正面視において、前記入射部が前記湾曲部の最外周部よりも内側に位置することを特徴とする請求項１～５の何れか一項に記載の車両用灯具。 The vehicular lamp according to any one of claims 1 to 5, characterized in that, when the light guide is viewed from the front, the incident part is located inside the outermost peripheral part of the curved part.
JP2022072254A 2022-04-26 2022-04-26 Lamp for vehicle Pending JP2023161733A (en)

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